Filter



R. N. BURCKHALTER ET AL FILTER Filed July 16, 1952 2 Sheets-Sheet l Ww/@mwa fm, 22%@ Jan. 15, 1935.

Jan. 15, 1935. R. N. BURCKHALTER ET AL 11,988,262

' FILTER Filed July 1G, 1932 I 2 Sheets-Sheet 2 'm and durable inservice.;Morespecinc objects equipped with@ lterl; cooling ooil PatenteclJan. 15, 1935 ifff 1eme Robert "Nash Ammon; Jut. 16; meseta.

sburn,lMichigan yg, Ind.

Buchhalter @More Marsha# 11. Claims (C1-1ero ,'lhis. invention). relates to air filters `for use in airfoohditoning apparatus, and has forr its priml clpat object to. provide `asimple construction that: can. be cheaply made and will :be .efficient betet/eelco. as the. description vis read. in connection with the accomp,fmying drawings, .in

Jlflil4 y .i l

Eig... 1 .is a. diagram in. plan, illustrating ahora.

tion; of. air conditioning. system inwhioh the ltorisuse Eis.. 2 is'aaside'felevation .of the filter uniti, 7

Fig. 3 is an end elevation ofthe. Same.; y

4 transverse verticalsection onen enlarged le with the intermediate'. nor-tion brolsenawayiand l i Egw is. a horizontal socfen ofY one end rubr-k tioo: oil the lter, theromaindor being @roken away; z o. Fie .6. is a. Vertioolsecton oifithenlter oonnshowngthe mod ined form or means tios tho'tonsiouz. and a f 11n the. foridrivlne arfanfll in arly other apparatus vto be The lter unit 13 .Comorseso Supply-tant 14, other .pronom or filter elem 16- .The lter .element istoomoosod of tlf plioitv .ot sheetso wire cloth opeoifioall this illustration there arefeleven sheetsflof" protected by sheets of expanded metal 2() which,

in effect, form gratings to prevent injury to the.

wire cloth in handling the lter units.

The group of wire mesh sheets and the expanded metal sheets are clamped in the relation shown by two sheet metal channels 21, one arranged at each end with the web' portion of each channel projecting 1/4", or some other suitable distance for cooperation with guides 22 in Ithe conduit, where the lter unit is to be used.`

This construction provides for easy insertion and withdrawal in and from the conduit.

The tank 14 is made of two pan-like sheet lmetal stampings having their flanges 23 and 24 telescoped as shown in Fig. 4, and welded together. The top 25 is provided with a filling .S441 Selected aco.. Y .to treatment for the-aoflionel a sump.

plug 25 andrtwohandlesf 2'7.v The;bottom28;.v is provided; with a Aplurality of perorations 29,;

.on theunderside. .of the bottom aretwosanglesi soctheyoerucai flanges .31; orwnicnare Spas: d. apart and lined with metal filler,pieces` 325` be. tween which the upper edgefottheailtorso' f mentproper isclampem as .best shown n Eiezi.- i

sono e.

berr whichl .may lo palloni .dietitian 113g ohvmei 19T* bengltis eouippedwith v. .iooroosomatee rial such asfeltfimrosso agar tthembottom.- 2.8m: the by barf.135;.oolts. Soiano Sorriso:

The sump 16 is composed of a sheet met@ 15;;

Stamping .providing a .bottom 3.821 sides-3.9J .i115

heots .r pieces... 4.2 .for ,gripping oliver. .element reads 4.3

Wtli'theuallsz S and the@ @lined sheet-49 ,1S provided .u1-th an 46 equipped with a plug 47. The en best illustrated .in drain plt 481A e @stop 4to.- upper edgespfflthe: sheets'formingthelter'el ment S properj and i;travelingv downwardly I along the wires and outwardly fromlthe intersections, o. the WiresQ-:serves vto4.coat.thersurfaces of wires and. ztherebyopresent. dustcatchin'gfzlareas c. o;y great mul-.tploity' in; various-staggered reise tionsy lloraba all glidnlattor in drawn ,t91.e5i The 1; ewipe: passes ii'ito the sump 16 taking with it extraneous matten Any oil falling to either side of the lter element proper is caught by the inclined sheets 40 and directed .into the sump, which can be readily emptied and cleaned by removing plugs 47 and 48 and injecting anair hose, or the like, as will be found most convenient. l v

In one instance, for example, where the lter element s195g" Wide and 11% high, a tank holding two quarts and a sump holding sixr quarts has been found satisfactory.

While wire cloth is at present preferredfor making the filter element, other materials 4presenting a multiplicity of intersecting or crossing strands may be used when conditions make them appropriate, and I have chosen the generic term,

rectiform, to dene. the character of material.

yand it is desirable to adjust the ow of liquid accordingly, and with ease. `The construction shown in Figs. 6 and 7 illustrates how such a situation may be met.

The similarity: of this modification to, that already describedis partly indicated by like reference numerals and is otherwise obvious.

` above the tank and the lower lends of the springs 37 bear on tapered Washers 51 cooperating with Wedges 52 carried by a slidebar lhaving slotsV to receive the bolts 50, andy connectedwitha@` bell crank 54 operated by a link, 55, Apivoted to one end of a lever 56 adjustable along a ment rack 57. n, f

The inclination and extent of the wedges is selected to permitadjustment .from a position invwhich the oil'is fed slowly through succes.

sive: positionsA to one inv which thefflowrwill rquickly flush the lterelement and wash away heavyldeposits Y Y Y We claim as ourinvention: i

lter `comprising f af supply` tank above Y and a sump below, and aplurality of rectiform Y sheets assembled close together to form a com pact lter elementi arranged upright beneath saidftank andabovesaid-sumps and elongated meansfincluding aY compressible chamber for regulating the iiow `from-the supplyftank and vthe distribution to the upperportions ofthe recti` 1 Iormsheets2 4 `2. Av lter comprising. a supply'tank for containing a liquidandhaving perforations in AVthel bottom,` a distributing "f chamber lbeneath the tank, a strip of'felt in the Adistributing chamber, means for controlling the rate of flow of said liquid through said felt, a rectiform structure beneath fthe felt and a sump!` beneath the rectiform structure.

A lter comprisingalv supply tank `havingperforations in the bottom, a distributing c lmxn-y ber beneath thetank Acharged with felt, means for' exerting pressure on the, felt to retard ilow through it, and a rectiform structure beneath' fcvzornduii; guides within said conduit, a iiltrer onii the distributing chamber.V I KTV1. In combination, acasing forming;` an lair p rising amultiplicity of rectiiorm sheets, chan-` nelY pieces receiving the "upright edges of the sheets, vsaid channel lpieces slidably engaging said guides, a tankhaving'means for'clasping the upper edges ofthe sheets, and ,a sump having means for claspingthe lower edges of the sheets, said tank, suxmpandsheetsl being removable from saidconduit by a movement longitudinally of said guides.

5. A iilter comprising an elongated tank per? forated along the middle portion of the bottom, angle pieces secured to the tank having` spaced iianges extending down alongside the perforations, a rectiformlstructure having its upper f tank for distribution to the rectiform structure. The bolts 50 corresponding to 26, project;`

form sheets, a tank having means tov bind the .jl-f6; A filter comprising a multiplicity of recti-l upper edges of the sheets, a sump having means to bind the bottom edges 'of the sheets, means for binding the upright edges between the tank andl sump, compressible means below said tank for supplying liquid'v from said tank to said sheets, 'and means for'lcompressing said compressible means. n

i7. A iilter comprisingSaf-'supply tank having perforations in the bottom, a distributing `chamber beneath the tank charged with feu, means 4for. exerting pressure onlthe `felt to retard flow throughvit, a rectiform structure beneath the distributing chamben and fmeans, for adj us'ting-` the pressure on vthe felt.r

` 8. A iilter comprising a supply tank` above' and a sump below, a filter element between the tank and suxnp comprising rectiform sheets, and means for binding the upright edges'y of the sheets,`isaid meansprojecting laterally from 'the edges of said sheets.. I c Y v9. A lter comprising a" supply tank' above,M a sump below, a-lter element extending between the tank and the sump,l andv means for regulating the iiow from thertank, saidv means inclu'ding a resiliently pressed element Aof forarnif nous material.

10. A filter comprising al tank `for.containing a uid having a plurality* of` perforations in its bottom wall, iilter material secured beneath said perforations and spaced therefrom, a; pad between said material and lsaid'v perforations,

` means for yieldingly pressing said rpadY against said perforations and means-forvaryingv the pressure oftsaid pad against said perforations.

11. A lter comprising a plurality of reatiform sheets assembled closely and upright; a

supply tank surmounting thesheet and attachedthereto, la sumpbeneath them having anV inset portion provided with a drain,V saidsheets being supported `by said inset portion, a pad between said tank and sheets, lsaid tank'having open'- ings in the'bottom wall above said pad,i means for compressingv said pad, and a single vleve!` for operatingsaid last-named means. 1

ROBERT NASH :BURCKHALTIER '1Y i JAMES MARSHALLV OSBURN.

CERTFICATE 0F CORRECTION.

Patent No. 1,988,262. January 15, 1935.

RBERT NASH BURCKHALTER, ET AL.

It is hereby certiiie that error appears in the printed specification of the above numbered patent requiring correction as follows: Page 2, first column, line 3l, claim 1, for "sumps" read sump; and. line 32, same claim, for "chamber" read member; and that the said Letters Patent should be read with these corrections: therein that the same may conform to the record of the case in the Patent Office. Signed and sealed this 5th day of March, A. D. 1935.

Leslie Frazer (Seal) Acting Commissioner of Patents. 

